1. MGC, Department of Cell Biology and Genetics, Erasmus University Medical Center, P.O. Box 1738, 3000 DR Rotterdam, The Netherlands
2. Unit of Circadian Systems, Department of Biological Science, Nagoya University Graduate School of Science, Nagoya 464-8602, Japan
3. Division of Molecular Brain Science, Department of Brain Sciences, Kobe University Graduate School of Medicine, Kobe 650-0017, Japan